• Code: 843.05
• Description: Carriage overun
• Remedy: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.06
• Description: ADF nudger
• Remedy: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.99
• Description: Scanner complete timeout error
• Remedy: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 849.01
• Description: Configuration error - the device had modem installed, but configID indicates it should not.
• Remedy: Contact the next level of support. They will give the instructions on how to resolve the error.

• Code: 849.10
• Description: Configuration error - the device had HD installed, but configID indicates it should not.
• Remedy: Contact the next level of support. They will give the instructions on how to resolve the error.

• Code: 900.xx
• Description: Controller firmware errors
• Remedy:

• Code: 912.xx
• Description: Unrecoverable Engine firmware error POR the machine. If the error re-occurs, then update the firmware. If the error remians, then replace the controller board.
• Remedy:

• Code: 940.xx
• Description: Controller to engine communication failure - the zero crossing signal used for fuser control in the low voltage (LV) power supply has failed, or the wrong low voltage power supply has been installed.
• Remedy: Step 1: 1. Check the power cord for continuity. If necessary, replace. 2. Make sure the nominal voltage source is within specification. Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: Check if the power supply cable is properly connected to the controller board. Is it properly connected? Yes: Go to step 3. No: Reseat the cables.
  Step 3: 1. Turn off the printer. 2. Remove the power cord. 3. Measure the resistance between terminals A and D of the power supply socket. Is the resistance approximately 30 ohms? Yes: Contact your next level of support. No: Replace the power supply.